/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2012-2014 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * OpenSearchServer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with OpenSearchServer. 
 *  If not, see <http://www.gnu.org/licenses/>.
 **/

package com.jaeksoft.searchlib.index;

import java.util.Set;

import org.apache.lucene.document.FieldSelector;
import org.apache.lucene.document.FieldSelectorResult;

public class FieldSelectors {

	public static class SetFieldSelector implements FieldSelector {

		private static final long serialVersionUID = -4722731991166993080L;

		private final Set<String> fieldSet;

		public SetFieldSelector(Set<String> fieldSet) {
			this.fieldSet = fieldSet;
		}

		@Override
		public FieldSelectorResult accept(String fieldName) {
			return fieldSet.contains(fieldName) ? FieldSelectorResult.LOAD
					: FieldSelectorResult.NO_LOAD;
		}
	}

	public static class LoadFieldSelector implements FieldSelector {

		private static final long serialVersionUID = -3715252854746008002L;

		public final static LoadFieldSelector INSTANCE = new LoadFieldSelector();

		@Override
		public FieldSelectorResult accept(String fieldName) {
			return FieldSelectorResult.LOAD;
		}
	}
}
